package cn.edu.ctbu.datajpa01.service.impl;


import cn.edu.ctbu.datajpa01.domain.Student;
import cn.edu.ctbu.datajpa01.exception.REnum;
import cn.edu.ctbu.datajpa01.exception.RException;
import cn.edu.ctbu.datajpa01.repository.StudentRepository;
import cn.edu.ctbu.datajpa01.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import java.util.List;

@Service

public class SudentImpService implements StudentService {

    @Autowired
   StudentRepository studentRepository;

    public Student findByNameAndPassword(String name, String password) {
        List<Student> byNameAndPassword= studentRepository.findByNameAndPassword(name,password);
        if(byNameAndPassword.size()>0){
            return byNameAndPassword.get(0);
        }else {
            throw new RException(REnum.LOGIN_ERR);
        }

    }


    public List<Student> findAll() {

        return studentRepository.findAll();
    }


    /**
     * 只分页的查询
     * @param pageable
     * @return
     */
    public Page<Student> findAll(Pageable pageable){
        return studentRepository.findAll(pageable);
    }

    /**
     * 分页,带过滤的查询
     * @param pageable
     * @return
     */
    public Page<Student> findAll(Example<Student> student, Pageable pageable){
        return studentRepository.findAll(student,pageable);
    }

    /**
     * 按id进行查询
     *
     * @param id 主键，整数
     * @return
     */
    public Student findById(Integer id) {
        return studentRepository.findById(id).orElse(null);
    }

    /**
     * 按名字进行查询,like
     *
     * @param name 主键，整数
     * @return
     */
    public List<Student> findByName(String name) {
        return studentRepository.findByNameLike(name);
    }
//
//    /**
//     *按名字和密码进行查询
//     * @param name
//     * @param password
//     * @return
//     */
//    public List<Student> findByNameAndPassword(String name,String password) {
//        return studentRepository.findByNameAndPassword(name, password);
//    }
    public Student insert(Student student){
        studentRepository.save(student);
        return student;

    }
    public Student update(Student student)
    {

        studentRepository.save(student);
        return student;
    }
    public void delete(Student student){
        studentRepository.delete(student);
    }
    public  void delete(Integer id){
        Student student=new Student();
        student.setId(id);
        studentRepository.delete(student);
    }


}


